A cube is floating in a liquid as shown in figure. Match the following

List I	List II
A) If density of liquid decreases, x will	P) increase
B) If size of cube is increased, keeping density same, x will	Q) decrease
C) If the whole system is accelerated upward, x will	R) remain same
D) If the whole system is accelerated downward, x will	S) first increase then decrease
	T) first decrease then increase